EP 1901359 B1 20090527 - Actuator driving control device and actuator driving control method
Title (en)
Actuator driving control device and actuator driving control method
Title (de)
Aktorantriebssteuerungsvorrichtung und Aktorantriebssteuerungsverfahren
Title (fr)
Dispositif et procédé de commande d'entraînement d'un actionneur
Publication
Application
Priority
- EP 06024056 A 20061120
- JP 2005336138 A 20051121
- JP 2005336174 A 20051121
- JP 2005336229 A 20051121
Abstract (en)
[origin: EP1901359A2] A driving control device (120) controls supply of driving pulses to expand and contract a piezoelectric element (12) so that an expansion rate is different from a contraction rate, to vibrate a driving rod (17) and move a lens (21) frictionally engaging with the driving rod (17) in two directions. The driving control device (120) includes a forward measuring unit (131), a backward movement controlling unit (133), a backward measuring unit (134) and a movement direction determining unit (135). The driving control device can realize an automatic focusing (AF) search with higher accuracy even at the time of low luminance and/or low contrast. The control mechanism for AF searches is based on AF evaluation values in both lens moving directions.
IPC 8 full level
H01L 41/04 (2006.01); G02B 7/08 (2006.01); G03B 3/02 (2006.01); G03B 13/36 (2006.01)
CPC (source: EP KR US)
G02B 7/08 (2013.01 - EP KR US); G03B 3/02 (2013.01 - EP KR US); G03B 13/36 (2013.01 - EP KR US); H02N 2/025 (2013.01 - EP KR US); H02N 2/062 (2013.01 - EP KR US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1788644 A2 20070523; EP 1788644 A3 20070801; EP 1788644 B1 20080806; AT E403942 T1 20080815; AT E432536 T1 20090615; DE 602006002090 D1 20080918; DE 602006007002 D1 20090709; EP 1901359 A2 20080319; EP 1901359 A3 20080326; EP 1901359 B1 20090527; KR 100834376 B1 20080602; KR 100842254 B1 20080630; KR 20070053640 A 20070525; KR 20080011153 A 20080131; TW 200721658 A 20070601; TW I321393 B 20100301; US 2007115568 A1 20070524; US 7280292 B2 20071009
DOCDB simple family (application)
EP 06024056 A 20061120; AT 06024056 T 20061120; AT 07021211 T 20061120; DE 602006002090 T 20061120; DE 602006007002 T 20061120; EP 07021211 A 20061120; KR 20060115119 A 20061121; KR 20070141383 A 20071231; TW 95142808 A 20061120; US 60168806 A 20061120